AIght this is whats up.. Im going to upagrade the sysem on my civic but ive never done audio so my ? is what all do I need?

I know I need an amp
subwoofers?
speakers and ofcourse the stereo but i got that already.What else I need to know exactly every single little thing I need to get.

Also I work for a store and can jack all of this stuff so I've scouted the sony "12 subs the red ones that put out 1200 watts so I want both of them?

Also be specific for Quantity,and minimum power outputfor speakers, amp,wires etc.

Don't get the sonys...
Do you want to run coaxials or components... I will go from there after that.

Also, how much money?